Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bc8d4fe3e650b4…

MALICIOUS

PDF

84.3 KB Created: 2021-07-22 23:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ac7d9b00b233f6e716c8606ad6605dc SHA-1: 7368e7c098263060bac4992ae22515a759aba6d8 SHA-256: a8bc8d4fe3e650b4fbc5bf0cefb3ee2c71ccfdb867cbdea2d8409137f970cf07
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI that points to a Google Feedproxy URL, which is often used to obscure the true destination. The PDF structure itself is also suspicious, with duplicate object bodies, indicating potential obfuscation or malicious intent. The primary attack pattern appears to be delivering a malicious payload or leading the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/kVSxLQpkboc/square?utm_term=no+one+can+take+away+what+god+has+for+you
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f8a489c368992324f9b3c6/1626907785912/61899606939.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7fce4d401bc6ded2cabb8/1626864868703/40587763754.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6a817e5d82420ec19df1c/1626777623540/the_best_answer_of_tell_me_about_yourself.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edf875017ec663b53f472c/1626208373224/cities_within_4_hours_of_omaha.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0d746f32be22f0072633f/1626396486284/cheats_for_sleeping_dogs_xbox_360.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f8b52e1c69b90b7a7d50cf/1626912046958/we_want_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4bc2e70ff22042a14c84c/1626651694437/94977682986.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1aeee3600085b4744ca4e/1626451694249/gnm_1st_year_paper.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1640444f13e0787b516b3/1626432516469/scaly_skin_on_chest.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec94413631fd4ab8179672/1626117185091/96683704984.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f930ebfd7e2736eb378df8/1626943723981/league_of_justice_zack_snyder.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2adcdcba7b71501df9563/1626516941461/ferikomu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb5dcffa5e93eb2940f2b/1626125788386/vosovekelejunagefutalukax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5a9d497ec71328015b5d8/1626712532376/the_durrells_lawrence.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb2979a9df7051d41470c/1626190488070/sogoxarodugebekosunizipaw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff3af0dea5e4896bc8f38/1626338224047/24100836009.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
font_01_sfnt_off0000fadf.bin
ecf2953d64cf2a1e103437a481b8d79fd0b2c758b03be350867909cded9edcad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 17236 bytes
font_02_sfnt_off000127e0.bin
8af75e3ad68492c3b04ca9b7aaed52a28535859299597b52eccc774868b5270f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E0 10984 bytes

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